Had my drivers window in my '92 IROC fall down today and the motor was grinding. Took it apart and found the nylon strip that the gear on the motor rides on was busted. Got the window shut most the way. All the parts stores say they don't carry it and I have to go to a dealer to get it. I've found DORMAN has a similar part but the people who sell it say it won't fit. Has anyone had this unfortunate issue and what have you done to fix it?